A parallel beam of light of wavelength 500 nm falls on a narrow slit and the resulting…
Physics · Class 12 · CBSE — Wave Optics
A parallel beam of light of wavelength 500 nm falls on a narrow slit and the resulting diffraction pattern is observed on a screen 1 m away. It is observed that the first minima is at a distance of 2.5 mm from the centre of the screen. The width of the slit is
- 0.2 mm
- 1 mm
- 2 mm
- 1.5 mm
Answer
(A) 0.2 mm
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